Fixing transparent pixels appearing black when rendered for the context menu.

chrome/browser/renderer_context_menu/render_view_context_menu_browsertest.cc

Index: chrome/browser/renderer_context_menu/render_view_context_menu_browsertest.cc
diff --git a/chrome/browser/renderer_context_menu/render_view_context_menu_browsertest.cc b/chrome/browser/renderer_context_menu/render_view_context_menu_browsertest.cc
index c90176f4a8087aae54b0c4aadec5b4418e9fad01..2e8532b735f08a45e22413d7b792bf4097829c3c 100644
--- a/chrome/browser/renderer_context_menu/render_view_context_menu_browsertest.cc
+++ b/chrome/browser/renderer_context_menu/render_view_context_menu_browsertest.cc
@@ -740,7 +740,7 @@ IN_PROC_BROWSER_TEST_F(SearchByImageBrowserTest, ImageSearchWithCorruptImage) {
   base::RunLoop run_loop;
   bool response_received = false;
   thumbnail_capturer->RequestThumbnailForContextNode(
-      0, gfx::Size(2048, 2048),
+      0, gfx::Size(2048, 2048), chrome::mojom::ImageFormat::JPEG,
       base::Bind(callback, &response_received, run_loop.QuitClosure()));
   run_loop.Run();